Usually when an editor flips a shot, it's to preserve continuity of screen direction, and the editor figured that the discontinuity of a mirrored shot was less important than the continuity of screen direction. Sometimes shots can be flipped back and it won't be a problem, but in this case I'm betting that when Ady flipped the shot back, they were running/walking the wrong direction. Usually, flipped shots aren't very noticeable, but in the case of "Star Wars" where a lot of things are asymmetrical (like Artoo, or Chewie's ammo sash), it can stick out more than usual.